Many of Roerich’s works are magnificent scenes of nature, and his themes are inspired by history, architecture and religion. His paintings are mystical, allegorical and even prophetic. Between 1912 and 1914, his paintings often reflected a sense of impending cataclysm. One of these, The Last Angel (1912), depicts an intense conflagration enveloping a city; above the city, surrounded by billowing clouds of smoke, an angel bearing a sword and shield heralds the Final Judgment. In 1936, just before World War II, Roerich painted Armageddon. One can see the rooftops of a city visible through clouds of smoke with the silhouettes of soldiers marching in the foreground across the bottom of the picture.